Atlas / NTSB / SEA66F0152

NTSB CAROL · Event

Event SEA66F0152

1965-10-13 SILVERDALE, Washington, United States None 1 aircraft Status: Completed

Registry · N3122A

FAA Aircraft Registry record.

Make / Model

CESSNA 170B

Year of manufacture

1953 · 12 years old at event

Engine

CONT MOTOR C145 SERIES (145 hp)

Seats / Engines

4 seats · 1 engine

Last airworthiness date

19561009

ADS-B equipped

Yes — Mode-S A350DE

Registrant of record

JOHNS WILLIAM D

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

N3122A Cessna 170B None

Historical record (pre-1982)

NTSB recorded this accident in the pre-1982 coded-field schema — structured fields rather than free-text narrative. Decoded codes use established NTSB single-letter taxonomies; cause factors remain verbatim pending the Form 6120.4 codebook lookup.

Aircraft

CESSNA 170B · N3122A

Damage

Substantial

Craft type

Airplane

Classification

Accident

Light condition

Dawn

Weather

VMC

Phase of flight

Takeoff — initial climb (C1)

Operator type

D

Airport

APEX AIRPARK

Kind of flying

DB

Weather at impact

Sky

BROKEN

Temp

60° F

Aircraft history

Total time

1,450 hrs

Pilot

Certificate

Commercial

Total hours

900

Age

39

Probable cause (from PRE1982.MDB)

N

Investigator remarks

EXHAUST VALVE BURNED.SPARK PLUGS EXCESSIVELY WOR

Cause factors

74/C/AF C
POWERPLANT VALVE ASSEMBLIES Cause
74/C/BC C
POWERPLANT SPARK PLUG Cause
88/C/36 C
MISCELLANEOUS ACTS,CONDITIONS FATIGUE FRACTURE Cause
68/C/D6 C
PERSONNEL INADEQUATE MAINTENANCE AND INSPECTION Cause
88/K/94 K
MISCELLANEOUS ACTS,CONDITIONS OVERLOAD FAILURE Joint factor

Decoded against the NTSB Form 6120.4 cause-factor codebook (ct_Pre1982 table). Each row shows the raw triplet, modifier (Cause / Factor / etc.), category, and specific code.

Source: NTSB pre-1982 historical archive. Docket 3 3680. Source file NTSB_1965_3_3680.txt. Modern CAROL record on data.ntsb.gov ↗.

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